To add to the argument about European funding, Polish people are also very hard-working and probably have the mentality closest among European countries to what the USA had in the twentieth century with the pursuit of the American Dream. The only difference is motivation. Polish people suffered a lot in the past, so they do not want to experience poverty again; thus, their drive is powered by insecurity compared to an optimistic confidence that hard work would lead to prosperity in the future (this is also seen in the Polish sense of humour, which is much darker). I suppose it is mostly because of the post-communist Balcerowicz Plan transformation and the first generations travelling to the West for work, which further solidified the belief in upward mobility from the lower class to the middle class to the upper class through hard work.